MC NARY DAM, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(455231) MC NARY DAM
From Year=1954 To Year=2008
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	2	39	194	385	621	596	318	66	3	0	2225
57	0	0	1	23	148	326	559	534	262	43	1	0	1897
60	0	0	0	9	92	242	466	441	183	19	0	0	1454
65	0	0	0	1	33	125	315	290	82	3	0	0	848
70	0	0	0	0	8	51	181	157	26	0	0	0	422

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu